Green synthesis and characterization of Parkia roxburghii fruit extract mediated silver nanoparticles and their antibacterial activity

For environmental benignity, we report an eco-friendly approach for the preparation of silver nanoparticles (AgNPs) using the fruit extract of Parkia roxburghii collected from Nagaland, India, and evaluating their antibacterial activity. The morphology and crystalline phase of the synthesized AgNPs were characterized using FT-IR, UV-vis spectroscopy, XRD, SEM, SAED, and TEM analysis. The FT-IR study revealed the presence of phytochemicals that act as a reducing and capping agent for the synthesis of AgNPs. SEM and TEM analysis revealed that the AgNPs were spherical with an average particle size of 16.63 nm for the size distribution. SAED spectrum indicated that the AgNPs were crystalline which was also confirmed by the XRD studies. The antibacterial potency of the synthesized AgNPs was investigated by disc diffusion method against two-gram negative (Escherichia coli and Klebsiella pneumonia) and two-gram positive (Bacillus subtilis and Staphylococcus aureus) bacteria showing its distinctive activity. The study confirmed Parkia roxburghii as a potential biomaterial for the green synthesis of AgNPs along with their possible application as an antibacterial agent.